Mongo - query

    [
        { "$match":
            {
                "$gt": { "timeStamp": self.starting_time },
                "$lt": { "timeStamp": self.finishing_time }
            }
        },
        { "$out": destination_collection_name }
    ]

# similar to

    [
        { $match:
            {
                date: "20120105"
            }
        },

        { $out: "subset" }
    ]

# but you have

    {
         "$match":
            {
                "$gt": { "timeStamp": self.starting_time },
                "$lt": { "timeStamp": self.finishing_time }
            },
            { "$out": destination_collection_name }
    }

# which is incorrect Python dictionary and incorrect JSON